EP3088274A1 - Image de détail vidéo de la géométrie de piste - Google Patents

Image de détail vidéo de la géométrie de piste Download PDF

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Publication number
EP3088274A1
EP3088274A1 EP16166955.1A EP16166955A EP3088274A1 EP 3088274 A1 EP3088274 A1 EP 3088274A1 EP 16166955 A EP16166955 A EP 16166955A EP 3088274 A1 EP3088274 A1 EP 3088274A1
Authority
EP
European Patent Office
Prior art keywords
camera
lamps
lamp
rail
light
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP16166955.1A
Other languages
German (de)
English (en)
Other versions
EP3088274B1 (fr
Inventor
Hans Jagtenberg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
VolkerRail Nederland BV
Original Assignee
VolkerRail Nederland BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=56083896&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP3088274(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by VolkerRail Nederland BV filed Critical VolkerRail Nederland BV
Priority to PL16166955T priority Critical patent/PL3088274T3/pl
Priority to EP20176197.0A priority patent/EP3736194A1/fr
Publication of EP3088274A1 publication Critical patent/EP3088274A1/fr
Application granted granted Critical
Publication of EP3088274B1 publication Critical patent/EP3088274B1/fr
Revoked legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L23/00—Control, warning or like safety means along the route or between vehicles or trains
    • B61L23/04—Control, warning or like safety means along the route or between vehicles or trains for monitoring the mechanical state of the route
    • B61L23/042—Track changes detection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61K—AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
    • B61K9/00—Railway vehicle profile gauges; Detecting or indicating overheating of components; Apparatus on locomotives or cars to indicate bad track sections; General design of track recording vehicles
    • B61K9/08—Measuring installations for surveying permanent way
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
    • G01B11/245—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures using a plurality of fixed, simultaneously operating transducers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
    • G01B11/25—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures by projecting a pattern, e.g. one or more lines, moiré fringes on the object

Definitions

  • the quality of the track geometry of the superstructure of the, e.g. Dutch, rail network to transport persons and / or goods is measured periodically.
  • the associated information is obtained from measurement data, which is produced using measurement trains and switch inspection vehicles for automated measuring the track geometry of the superstructure of the track.
  • the by the measuring train and switch inspection vehicle obtained data should enable the railway manager to find the following defects and rail interruptions through remote monitoring:
  • the measuring train should obtain the correct measurement data independent of different weather conditions. These weather conditions are: ambient temperatures between -20 and +40° C; rain to an intensity of 27 mm / h; fog or snow with a view of at least 100 m; as long as the railway lies not in a thick layer of snow; both by night and day, free from the influence of light from the environment(thus a recording made at night or on a sunny day or overcast day provides the same results).
  • weather conditions are: ambient temperatures between -20 and +40° C; rain to an intensity of 27 mm / h; fog or snow with a view of at least 100 m; as long as the railway lies not in a thick layer of snow; both by night and day, free from the influence of light from the environment(thus a recording made at night or on a sunny day or overcast day provides the same results).
  • the video image recording must be able to be displayed in such a way on the display that a good visual inspection is made possible.
  • the images should be sharp. When an image is made up of the recordings of two or more cameras, the images from these cameras are to be aligned, so that the same place is displayed.
  • the video recording must be good at all speeds up to 100 km / h for the free path and to about 50 km / h on a switch and must be adapted for automated image recognition (visual edging technology), including parts recognition, damage detection, degradation recognition.
  • a complicating factor is the measurement train which during driving is swaying, stomping and makes rolling movements because the wheels are suspended resiliently. Mounting the instrument to the non spring suspended part of the measurement train, such as the wheel axles, avoids these movements, however, is not always possible or desirable, for example because of vibration problems are introduced.
  • the instrument to the resilient suspended part of the measuring train such as the car floor
  • there should be taken into account for instance retraction and extension of the wheel suspension thus, for example, the distance and angle between the measuring system (such as cameras, lamps) and the to be photographed track and roadbed continuously varies.
  • the video detail image must also meet the following requirements: color images of the inside of each rail, made at an angle of +/- 30 degrees and with a minimum resolution of 1,0x1,0 mm of the object; color images from the outer side of each rail, made at an angle of +/- 40 degrees and with a resolution of a minimum of 1,0x1,0 mm of the object; image of such a surface that the overrun portion of a cross piece of a Englishman is clearly made visible in two rides.
  • the video overall image must also meet the following requirements: in a single image recording, the two rails of the switch, including the sleepers; the imaging should record a width at least equal to the width of a standard cross-beam (in other words a minimum of 2.6 m); the image recording may be composed of video recordings of several cameras; the image-recording must be made from the camera position right above the rails and the cross-beam; color or black / white images; a resolution of at least 1,0x1,0 mm of the object, for example a pixel size up to 0.7 mm.
  • the upper surface of the rail needs for visual inspection, a black and white or color image displayed on a screen such that squats can be detected early, so that with a certainty of at least 95% a defect of 4.0 mm whose location is detected with an imprecision of 1 mm is determined.
  • This is rail surface image recording.
  • the object of the invention is the provision of one or more of:
  • the effect of the invention is that in the image recording the tread band is bright and clearly visible against a dark background and all other components of the superstructure of the track belong to the dark background. This effect is insensitive to train movement. This effect is achieved by the optimal combination of lighting, camera setting and mutual location of the parts.
  • a digital matrix camera (so-called area camera) or line scan camera; a camera of CMOS or CCD type; a camera with a resolution of 600x400, preferably at least 1000x1000, more preferably at least 1500x1000, 1600x1200, for example, approximately (or equivalent resolution line scan); a color camera; per rail at least or exactly two cameras, which are aligned and focused on the same recording area of the railway; per rail at least or exactly one or two or three or four or five lamps, preferably flash lamps, preferably each in its own housing and / or with mutual spacing; a lamp includes LED's in a two-dimensional pattern; a lamp contains at least five parallel-running lines (for example, with a length at least 5 or 10 or 15 cm and / or up to 30 or 40 or 50 cm) ; per line LED' s with a large plurality, preferably at least 20 (for example, 26) LED's per 200 mill
  • the flash duration for the common lamp(s) is prolonged than for the own camera-lamp(s), preferably at least 10% longer-term, wherein preferably its flashing starts with the respective camera-own lamps and preferably continues during the pause time, preferably a part of the pause time; seen in top view a lamp and two cameras are on a single line perpendicular to the longitudinal direction of the rail and / or a camera between two lamps on one line parallel to the longitudinal direction of the rail; the lamps and cameras are built-in in an upwardly and around the side substantially light-tight enclosure, downwards sufficiently open to the lamplight to shine unhindered on the track and cameras have unhindered visual recordings of the by the lamps illuminated part of
  • a digital matrix camera or line scan camera
  • camera of CMOS or CCD type or at least one or two cameras, preferably of line scan type and / or colors type
  • the camera hangs vertically right above a rail and / or vertically downward direction; the camera is aimed at a light element on the superstructure of the projected light rail line; the light line is continuous from the one end to the other end of a sleeper; it on a part of the superstructure, for example, rail head, and possibly rail foot, projected part of the cut line provided by a single light element and the part of the light line on one or both sides thereof by a double- lighting element; a light element allows a light line in substantially of the same length as the light element; the area of, for example, directly below or above, or
  • the common light line having a width at least 10 and / or up to 50 millimeters, for example, about 30 millimeter (for example, in the idle state of the train);
  • the common line-focused light beams of rays are so mutually oriented that vertical distance variation between the rail head and light beam, for example at compression of the spring suspension of the train wheels, a stroke for example, at least 10, and / or up to 40 centimeters, for example, approximately 20 centimeters
  • the common light line varies limited in width, for example about a maximum of 10 or 20 millimeters, preferably related to the width of the light line in the resting state of the train;
  • the light beams and cameras are in a mutually fixed position mounted, preferably fixed to the train, for example, under the underbody;
  • a light bar is a so-called LED line light;
  • a light bar is a linear light source; has a light bar at approximately 30 degrees to the vertical oriented; two light bars run parallel to each other and / or their
  • a single central lamp is hanging vertically above the associated rail and shines straight down, the camera and two additional flash lamps hanging aside the rail and are aimed at the by the central flash lamp targeted area of the railway.
  • FIG. 9 two central flash lamps are suspended vertically above the associated rail and shine inclined down on a common region of the rail and its environment, the camera and two additional flash lamps are hanging to the side of the rail and are aimed at the by the central flash lamps targeted area of the railway.
  • Fig. 11 shows the timing of the flashes from the flash lamps and the exposure of the cameras.
  • the central flash lamp 5 burns 160 mu s, during which the flash lamps 1 and 2 each 70 mu s are on, the lamps 1 in the first and the lamps 2, during the second half of the duration of the flash of lamp 5.
  • the exposure takes place in the associated cameras 3 and 4 the duration of which depends on the speed of the measuring train.
  • Fig. 12 shows a front view of the rail with at a distance above it the light-tight housing which contains the long light bar and centered at a distance behind it(thus not visible and therefore shown in broken lines), the short light bar, there above the two cameras and further aside flush with the camera's the additional light bars and also dotted the beams of the light bars and the viewing angles of the cameras.
  • Fig. 13 shows the top view of Fig. 12 for the light bars and cameras c.
  • a single light bar located on either side thereof two light bars.
  • Fig. 14 shows the light-tight enclosure with dotted an additional light bar L whose light beam goes through a light transmissive window v. The direction of travel is indicated by arrow P.
  • Fig. 15 shows the light bars, and cameras mounted in the housing, looking from above into the housing. Clearly shown is that the additional light bars are double.
  • Fig. 16 shows the two of the parallel-running light bars emanating light beams providing a common light line projected on the railway and in width varying over the stroke s due to resilient movement in and out during driving of the measuring train.
  • the line width projected on the railway is max(r level at half stroke s at which position r represents, for example the top of the ballast bed), at movement in and out of the suspension the car bottom w moves closer respectively further from level r.
  • the horizontal arrow shows the direction of travel.
  • Fig. 17 shows the light spectrum of the preferred LED.
  • Fig. 18 shows in side view and Fig. 19 in front view the rail with at a distance above it the light-tight housing (not shown) and mounted therein per rail r two LED line lights 1 with centered at a distance between them the corresponding camera c. Of the rail r the upper surface and the rail foot are shown as indicated by two parallel horizontal lines. The measuring train moves forward according to arrow v. The line lights 1 illuminate the upper face over the entire width and the camera sees the entire width of this top surface.
  • the camera has a lens with a focal distance of 50 mm.
  • the camera lens is 550 mm, the lens LED lights line 340 mm above the upper surface of the rail.
  • the light sensor (one line of 1024 pixels) of the camera has pixel size 10 or 14 mu m. Exposure time between 2 and 30 mu s. Aperture F2.8 camera. The line lights make an angle of 30 degrees to the vertical.
  • the camera looks vertically down and is centered right above the rail.
  • Fig. 20 shows the light-tight enclosure. The direction of travel is indicated by arrow P.
  • Fig. 21 shows the light beams of the two mutually parallel light lines providing a common light line which is projected onto the tread band and in width varies over the stroke s due to in and out movement of the suspension during driving of the measuring train.
  • the line width projects on the rail running face maximum (r level at half stroke s), at in and out movement the underbody w moves closer to respectively further away from level r.
  • the horizontal arrow shows the direction of travel.
  • Fig. 17 shows the light spectrum of the preferred LED. Final remarks.
  • the invention for example, relates to one or more of: - A measuring train with an optical system having means to, of an area of the superstructure of a railway which is straight below the measuring train, make one or more of: video detail images; video total images; images of the upper surface of the head of the rail.
  • the invention includes many different versions.
  • a feature forms, individually or in combination with other features as disclosed herein, the invention, optionally in combination with one or more of the other features disclosed here, individually or in combination with other features.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
EP16166955.1A 2015-04-24 2016-04-25 Image de détail vidéo de la géométrie de piste Revoked EP3088274B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL16166955T PL3088274T3 (pl) 2015-04-24 2016-04-25 Szczegółowy obraz wideo geometrii toru
EP20176197.0A EP3736194A1 (fr) 2015-04-24 2016-04-25 Image vidéo globale de la géométrie de piste

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NL2014719 2015-04-24
NL2014720 2015-04-24
NL2014805 2015-05-13

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP20176197.0A Division EP3736194A1 (fr) 2015-04-24 2016-04-25 Image vidéo globale de la géométrie de piste

Publications (2)

Publication Number Publication Date
EP3088274A1 true EP3088274A1 (fr) 2016-11-02
EP3088274B1 EP3088274B1 (fr) 2020-06-17

Family

ID=56083896

Family Applications (2)

Application Number Title Priority Date Filing Date
EP16166955.1A Revoked EP3088274B1 (fr) 2015-04-24 2016-04-25 Image de détail vidéo de la géométrie de piste
EP20176197.0A Pending EP3736194A1 (fr) 2015-04-24 2016-04-25 Image vidéo globale de la géométrie de piste

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP20176197.0A Pending EP3736194A1 (fr) 2015-04-24 2016-04-25 Image vidéo globale de la géométrie de piste

Country Status (5)

Country Link
EP (2) EP3088274B1 (fr)
ES (1) ES2808922T3 (fr)
HU (1) HUE050659T2 (fr)
LT (1) LT3088274T (fr)
PL (1) PL3088274T3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU190003U1 (ru) * 2019-04-17 2019-06-14 Акционерное общество "Фирма ТВЕМА" Мобильное устройство визуального обнаружения дефектов рельсового пути
WO2022253660A1 (fr) * 2021-05-31 2022-12-08 Plasser & Theurer, Export von Bahnbaumaschinen, Gesellschaft m.b.H. Système et procédé de détection optique d'une voie

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4915504A (en) * 1988-07-01 1990-04-10 Norfolk Southern Corporation Optical rail gage/wear system
WO1997011872A1 (fr) * 1995-09-26 1997-04-03 London Underground Limited Procede et appareil de surveillance de l'etat d'une voie
DE19721915C1 (de) * 1997-05-26 1998-12-10 Stn Atlas Elektronik Gmbh Verfahren und Vorrichtung zur Messung von Unebenheiten in einer Objektoberfläche
WO2001086227A1 (fr) * 2000-05-12 2001-11-15 Tecnogamma S.P.A. Appareil laser destine au controle des rails d'une ligne de chemin de fer ou de tramway
FR2890086A1 (fr) * 2005-08-25 2007-03-02 Jean Paul Courraud Procede de detection d'un profil de voie ferree et installation pour la mise en oeuvre du procede
US20080007724A1 (en) * 2006-07-10 2008-01-10 Wing Yeung Chung Rail Vehicle Mounted Rail Measurement System
EP1970279A1 (fr) * 2007-03-12 2008-09-17 Strukton Railinfra Installatietechniek B.V. Unité de caméra pour la surveillance d'une voie ferrée
EP2165915A2 (fr) * 2008-09-23 2010-03-24 VolkerRail Nederland BV Surveillance de l'aiguillage d'une voie ferrée et ligne de tramway
US20110181721A1 (en) * 2010-01-25 2011-07-28 Bloom Jeffrey A Optical path protection device and method for a railroad track inspection system

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19702072C1 (de) * 1997-01-22 1998-04-23 Fraunhofer Ges Forschung Vorrichtung zum Erfassen von Gleisverzweigungen
US20020176608A1 (en) * 2001-05-23 2002-11-28 Rose David Walter Surface-profiling system and method therefor
US8405837B2 (en) * 2004-06-30 2013-03-26 Georgetown Rail Equipment Company System and method for inspecting surfaces using optical wavelength filtering
CN202443227U (zh) 2011-12-21 2012-09-19 群光电子(苏州)有限公司 光管式调焦光箱
CN203025457U (zh) 2012-12-28 2013-06-26 北京大唐万邦复制技术发展有限公司 一种360°无光影多光谱产品图像采集工作台
CN105446058B (zh) 2016-01-07 2019-03-22 林璧光 一种直照式和柔光式可变换的拍摄用led照明灯

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4915504A (en) * 1988-07-01 1990-04-10 Norfolk Southern Corporation Optical rail gage/wear system
WO1997011872A1 (fr) * 1995-09-26 1997-04-03 London Underground Limited Procede et appareil de surveillance de l'etat d'une voie
DE19721915C1 (de) * 1997-05-26 1998-12-10 Stn Atlas Elektronik Gmbh Verfahren und Vorrichtung zur Messung von Unebenheiten in einer Objektoberfläche
WO2001086227A1 (fr) * 2000-05-12 2001-11-15 Tecnogamma S.P.A. Appareil laser destine au controle des rails d'une ligne de chemin de fer ou de tramway
FR2890086A1 (fr) * 2005-08-25 2007-03-02 Jean Paul Courraud Procede de detection d'un profil de voie ferree et installation pour la mise en oeuvre du procede
US20080007724A1 (en) * 2006-07-10 2008-01-10 Wing Yeung Chung Rail Vehicle Mounted Rail Measurement System
EP1970279A1 (fr) * 2007-03-12 2008-09-17 Strukton Railinfra Installatietechniek B.V. Unité de caméra pour la surveillance d'une voie ferrée
EP2165915A2 (fr) * 2008-09-23 2010-03-24 VolkerRail Nederland BV Surveillance de l'aiguillage d'une voie ferrée et ligne de tramway
US20110181721A1 (en) * 2010-01-25 2011-07-28 Bloom Jeffrey A Optical path protection device and method for a railroad track inspection system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU190003U1 (ru) * 2019-04-17 2019-06-14 Акционерное общество "Фирма ТВЕМА" Мобильное устройство визуального обнаружения дефектов рельсового пути
WO2022253660A1 (fr) * 2021-05-31 2022-12-08 Plasser & Theurer, Export von Bahnbaumaschinen, Gesellschaft m.b.H. Système et procédé de détection optique d'une voie

Also Published As

Publication number Publication date
EP3736194A1 (fr) 2020-11-11
PL3088274T3 (pl) 2020-11-30
LT3088274T (lt) 2020-10-26
ES2808922T3 (es) 2021-03-02
HUE050659T2 (hu) 2020-12-28
EP3088274B1 (fr) 2020-06-17

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